package GuavaTest;

/**
 * Created by wangyg 
 * on 2017/6/12 10:05
 */

import com.google.common.base.Optional;

public  class Test {
	public static void main(String[] args) {
		Optional<String> op = Optional.absent();
//		op.or(null);
		LikeMap<String> lm=new LikeMap<String>();
		String a=null;
		String b="12";
		op.orNull();
//	op.orNull();
	}


}
